26693742991 has 2 divisors, whose sum is σ = 26693742992. Its totient is φ = 26693742990.

The previous prime is 26693742989. The next prime is 26693743039. The reversal of 26693742991 is 19924739662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26693742991 - 2¹ = 26693742989 is a prime.

Together with 26693742989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26693742961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13346871495 + 13346871496.

It is an arithmetic number, because the mean of its divisors is an integer number (13346871496).

Almost surely, 2^26693742991 is an apocalyptic number.

26693742991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26693742991 is an equidigital number, since it uses as much as digits as its factorization.

26693742991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 58.

The spelling of 26693742991 in words is "twenty-six billion, six hundred ninety-three million, seven hundred forty-two thousand, nine hundred ninety-one".